Nail-feeding mechanism for barrel-nailing machines



Sept. 22, 19 25. 1,554,411

H. E. COOLEY um. minme uacnmusu FOR B ARREL gamma ucnmss Filed Feb. 16, 1920 s Sheets-Sheet 1 WITNESS l/VVENY'OR Coo/e f 61M M Z HTTOENEYJ Sept. 22(1925.

H. E. COOLEY NAIL FEEDING MECHANISM FOR BARBIBL NAILING IAQHINES 3 Sheets-Shed 2 Filed Feb. 16, 1920 .WVfi VTOE f. (20/ DEL.

ATTORNEXJ -5ept..22, 1925. 1,554,411

- H. E. CQOLEY NAIL FEEDING MECHANISM FOR BARREL MAILING MACHINba Filed Feb. 16, 1920 3 Sheets-Sheet :5

. Coo/e Patented Sept. 22, 1925.

UNITED STATES answer a. coomrgor wns'r BEND, WISCONSIN.

NAIL-FEEDING MECHANISM BARREL-NAILING MACHINES.

Application filed February 16, 1920. Serial No. 359,027.

To all whom it may concern.

' Be it'known that I, HERBERT E. Coonnr, a (lltlZQll of the United States, and a resident ofthe city of VVestBend, county of 5 Washington, and State oflVisconsin, have invented a new and useful Improvement in Nail-Feeding 'Mechanism for Barrel-Nailing Machines; and I do hereby declare the.

followingto be a full, clear, and exact descr1pt1on thereof, such as will enable persons skilled in the artto which the men.

tion pertains to make and use the same, ref-- erence being had to the accompanying drawings for a disclosure of one form in which my invention has beenembodied.

The invention resides in a ,nail feeding mechanism for use with a' machine for nailingthe lapped ends of a strip of veneer forming boxes of the barrel type,'and used generally for packing cheese.

The invention further consists of details which will be specified in the claims.

, In the accompanying drawings, Figure l is a view in side elevation of a barrel nail- 'ing machine provided with my improved nail feeding mechanism.

Fig. 2 is an enlarged plan view, partly in section of parts of the tack feeding mechanism, the View being taken upon the line 22, Fig. 1. i

Fig. 3 is an enlarged vertical section on the line 33, Fig; 1, looking in the direction of the arrow.

Fig. 4, is a plan View in section of the clutch mechanism for operating the hammer, the view being taken on the line l-f, Fig. 3.

Fig. 5 is a detail view of a portion of the clutch, the'view being taken on the line 5-5, Fig. 4.

Fig. 6 is an end elevation showingthe drum and the devices for expanding and contracting thesame. I

Fig. 7 is a view'looking from the rightof Fig. 6 and showing a part of the same mechanism. i

Fig. 8 is an end view looking from {the right in Fig. 1 and showing the clutch mechanism employed to connect the drum with. the driving means ofthe machine.

Fig. 9 is a vertical sectional, view of the clutch shown'in Fig. 8, and showing also the means for transmitting themotion of the driving mechanism.

Fig. lOis a sectional view of the guide by which the tracks are properly directed into the barrel when driven by the hammer.

Fig. 11 is a plan iew of the same parts. Fig, 12 is, a partly sectional view of the means for releasing the separated tacks for passage into the guide shown in Figs. 10

and 11.

In the drawings, the main frame of the machine is indicated by the letter A. A motor B is mounted upon a cross member of the said frame, and through the belt 5 drives the belt pulley C keyed upon the shaft 0, journalledin bearings at the rear of the machine.

A worm likewise fast upon the shaft c, engages a worm gear 0 keyed upon the hub c of the clutch rim 0*; The worm gear 0 runs in a bath of' oil 0 whereby lubrication of the worm and gear is effected in their constant rotation. The hub 0 of'the clutch rim 0 is mounted upon a tubular shaft 0 journalled in bearings and running lengthwise of the. machine. At its rear end the tubular shaft has fixed thereon a spider 0, to the'oppositely extending arms of which are pivoted brake shoes 0 designed for engagement' with the perimeterof the clutch I rim A shaft 0 rotates within the tubular shaft 0", and at its rear end carries a disc 0 at eccentric points upon which are connected the links 0 theother ends of which links are pivoted to the. brake shoes 0 e The drum D is set upon the front end of the tubular shaft 0, so as to rotate therewith when engagement of the shoes a with the clutch rim is effected. A lever 03 is set upon the projecting end of the shaft 0, at the front of the machine. By grasping the handle al fixed to the longer end of the lever cl, a limited rotary movement may be given to the shaft 0 and through the eccentric action of the disc 0 bring the brake shoes 0 into engagement with the clutch rim, which as. before stated is constantly rotated. The drum D is formed of two parts d and d the part d being carried upon spiders,

age

which at their hubs constitute the means for fastening the said drum upon the tubular shaft. The part (Z of the drum is pivoted at cl just inside the periphery, and a slight clearance is provided near the pivotal point, between the longitudinal edges of the parts (Z and (5, into which may be passed the end of the strip of veneer to be wound about the drum.

The opposite arm (35 of the lever (Z is provided with a radial slot d in which works a pin (3'' attached to one arm (Z of a toggle joint (2". One member of the toggle is carried by the part (Z of the drum and the other member thereof by the part (F. lVhen the toggle is straightened, the drum is eX- panded, and likewise when the toggle is broken the drum is contracted. A loop attached to the part a? of the drum serves to prevent the toggle from passing beyond its straightened position in expanding the drum. One member of the toggle is provided with provisions for screw adjustment, whereby the diameter of the drum may be adjusted with precision. A. spring (Z connecting the arm (Z with the part (0 of the drum tends normally to straighten the toggle.

hen the drum is collapsed by breaking the toggle joint the adjacent longitudinal edges of the parts (i and (Z hereinbefore referred to are separated for the insertion between them of a strip of veneer and when the toggle is straightened, the pivoted part Z of the drum is expanded to its outer position, with th'e result that the end of the strip of veneer is held between the adjacent edges of the drum near the pivotal point (5. The inner end of the radial slot (5 is cut out as shown at (Z for the purpose of permitting a slight further movement of the lever (I with the effect of more firmly setting the brake shoes in their engagement; with the clutch rim 0*, following the straightening of the toggle and the expansion of the drum to its full diameter. The drum now being coupled up to the driving mechanism is rotated with the result that the strip of veneer wound thereupon.

In the rotation of the drum, the strip of veneer is carried under and guided by a clamping bar E which stands normally a little above the surface of the drum, but which may be brought into clamping engag'ement with the strip after the latter has been wound upon the drum by means of a treadle T pivoted to a part within the frame, and connected to the said clamping bar by a link '6. I

The clamping bar E is mounted upon a pivot e secured in a standard a at the rear of the frame, so as to provide for vertical adjustment of the pivot to secure parallel ism of the clamping";- bar. It will be understood that after the strip of veneer has been wound about the drum, such strip will be clamped thereto by the said bar upon pressure being applied to the treadlc *1 and that the strip will be so held upon the drum while the tacks are driven into the lapped ends of the veneer.

A slide F is mounted for longitudinal movement in a dovetailed channel in the clamping bar E. A standard G rises from the slide F and carries at the upper end thereofa receptacle 9 into which the tacks to be used in the machine are dumped. A. wheel 9 with a roughened surface is journalled at the upper end of the standard and works through an opening in the front end of the receptacle 9. Parallel bars and are supported by the standard G with their rear ends under the receptacle g, and inclined to the front of the machine. The said bars and are separated a distance which will permit the shank of a tack to pass between them but will retain the tack by reason of the engagement of its head with the top surfaces of the said bars. It will be observed that a triangular space 9* is provided at a point below the bottom level of the receptacle 5], and forms a pocket into which the tacks will fall and come in contact with the roller 9 A shaft H is journalled in a bracket 7L attached to the rear end of the slide F. Rotating loosely upon the said shaft is a grooved pulley It, and fixed so as to rotate with the wheel 9" is a like grooved pulley if. A crossed belt 71 transmits the motion of the constantly driven pulley if to the wheel 9 Formed as a part of the pulley 72 is a sprocket 7L Upon the constantly driven shaft 0 is a sprocket and a third sprocket is car ried at the uper end of a swinging lever 0 mounted upon the frame of the machine at the front. end thereof, as indicated in Fig. 1. A s1 racket chain 0 passes about the sprocket wheels 0 72 and 0 so that the said sprocket wheels are constantly driven. A spring 0 attached at one end to the 0 permits the sprocket to have a yielding movement to compensate for any inequalities of the travel of the sprocket chain. during he movement of the slide F, as will be later described. In the operation of the machine there is considerable vibration, and the result of such vibration is to cause the tacks to gradually work their way into the pocket 9 of the receptacle g, where they come in o contact with the roughened surface of the constantly rotating wheel The tendency of the tacks under the vibration of the machine is to crowd against the wheel and the action of the latter tends to repel the tacks with the result that their points find their way into the open slot provided between the do vnwardly inclined bars 9 and 9 in actual operation of a rainc and at the other to the lever vices provided for that purpose.

Near their front ends the bars 9 and g are supported by a standard 9 rising from the slide F. Upon an arm of this standard is centrally pivoted at an escapement lever g to which is imparted a lateral vibra- The part designated I is the lever for operating the tack driving hammer the said lever being centrally pivoted at z to the slide F. Above its pivotal point rises an arm 2' whichis perforated at i The curved rear end 9 of the escapementlever 9 passes through the perforations in thearm i andas the lever I oscillates upon its pivot, the escapement lever given a movement. of vibration. The escapementwith which the said lever g is provided is comprised of a curved'pin g and a straight pin 9 the oppositely pointed ends of. which are sufficiently spaced in the direction of the length of the escapement lever to permit the shank of a single tack to pass between them upon each oscillation of the said escapement lever. The construction and. operation of the escapement' is clearly shown in Fig. 2. In order to prevent damage by reason of the engagement of the pin 9 with the shank of a tack as it passes down the channel formed by the separated bars 9 and g5, Imo'u-nt the said pin in the end ofa spring 9 which spring is secured to the outer side of the escapement lever. In case th point of the pin 9 should encounter the shank of a tack in its passage downthe slot, the spring will yield, 'hut upon the next oscillation. of the escapement lever will be released. In Fig. 2 I have shown the forward end of the escapement lever in the position of its outward throw, the forward tack in the slot resting against the end of the pin g.' The reverse movement of the escapement lever will cause the pin to withdraw its support of the tack and free the same for assa e into the tubular duct for conveyance to position un der the hammer, and at the moment of such reverse movement of the eseapement lever the pin g?" will pass infront of the second tack in the line and sq'hold'the tack until after the said pin 9 is withdrawn. Where- ,upon the tack then released will pass into engagement with the pin 9. It is believed that the operation of this escapement mechanism will be understood without further explanation.

In my improved machine I have providedin addition to the escapement devices, a dropper which will catch the-tack released by the escapement and at the proper moment veyor duct.

the-double points of the pin.

permit the said tack to fall into theron- This dropper is formed as a slide J having a longitudinal movement in guides j, with respect to the slide F. The front end 9' of the slide J is bent at a right angle and carries 'a double pointed pin 7' which is shown in Fig. 2 as extending im- 'mediately under the discharging end of the slot formed by the bars g and 9 When released by the escapement devices the tack will passfrom the said slot with the shank between and the head thereof resting upon The slide J isprovided near its mid length with a projection 7' positioned for engagement by a pawl j pivoted to the upper end of the arm a of the hammer operating lever. The oscillations of the hammer operating lever I will cause the pawl jfl'then in engagement with the projection j, to move theslide J of the dropper mechanism forward, and

withdraw the double pointed pin from its support of the tack, so that the latter is dropped point downward into the duct by "which'it'is conveyed to position under the tack driving hammer.

A fixed cam 7' upon which the pawl 7' rides during the described forward movement of the slide J, acts to release the projection 7' from engagement with the pawl. The rear end of the slide J is encircled by a spring j confined between one of the bearings for the slide and. a pin j passing throughthe end of the slide. -The forward movement of the slide J under the action of the pawl j serves to compress the spring j but immediately upon the disengagement of the pawl, the said spring expands so as to impart a quick rearward movement to theflslide and bring the double pointed pin of the dropper mechanism in position to catch the next tack when re leased by the scapement.

A delivering guide or nozzle K for positioning the tacks under the hammer is at-' nozzle K is composed of member 76 which guides the tack hammer k and two separable members 70 and 73 which are spring pressed upon the member s as shown in Fig. 10. A screw Z1 passes through the member. '70 and is threaded into the member k A springv 7c confined between the head of the screw and the member 76 acts to hold the parts in position, and yet permits them to separate when a tack is forced between them by a blow of the hammer. Itibs is on the bars]; and 71% take into correspondingly formed groovesin the front and back of the member 71: and maintain the vertical relation of the said members 70 and 72 with the part 76 The forward end of the hammer operating mechanism is notched as indicated --at 73 in Fig. 1, for the reception of the head of :the hammer k The hammer is poS i- 'tively actuated bYzEL'Cl'fIDk mechanisnrdriven from the shaft ,the rear-endof the lever I being slotted at 2' to [receive th pin of the'crank 21 fiXed to :the said shaft -H. Rotation of the shaft H with its crank will :therefo re imp art :movementto the hammer to drive the tacks. The shaft BI is coupled to the sprocket [L1 by means of anovel form of clutch. The hub of the sprocket wheel h is bored out for the reception of a clutch member L which latter is channeled longitudinally for the reception of a rocking 'm'ember Z. When th said rocking member Z is in normal position in thechannel of the clutch member L, the latter has an unbroken circumference, but when the said rocking member I is released it will be given a movement of martial rotation in the channel so thatoneedge thereof will project above the peripheral outline-of the hub, and hem position to engage any one of a series of @notc-hes Z formedaxially in the hub of the sprocket h t. The movement of the rocking --member is dueto the force of an expansion spring Z confined between the arm Z of the rocking member and the side wall 'ofa slotformed in the said clutch member L. lVhen the engagement of the rocking member Z-with one ofthe notches Z is permitted as described, the constantly rotating sprockeet wheel 7L will immediately couple the shaft H and rotate the crank 2' and operatethe hammer to drive a tack with each rotation of the shaft H.

A rock shaft M supported parallel with the slide F, and operated with aiha-ndle m at its front end, is provided at its rear .end with two arms or extensions which control the rocking; member Z as to its clutching engagement with the sprocket 79,. The arm m of vthe shaft M is provided with a projecting finger designed to *hold the arm Z of the rocking member Z in the full line position shown in F '5 in which position the clutch. member L will have an unbroken circumference. The :arm m on -.theshaft M "isdesigned to engage a projecting lip m" 011 the projection part of :the clutch member L and prevent the movement of the ,said clutch:underfhe influence of the spring Z By means of'thehandlem on the shaft M the-slide F is drawn to the front of the machine, and whilein this-positionthehandle is turned so as to rock the shaft on and re lease the arms m and m withrtheir engagement with the clutch. Immediately the springl turns the rocking'member Zso that engagement thereof with one of the notches Z in the hub of the sprocket k is effected and the shaft 7L is-rotated so as to drive, a tack with each oscillation of the lever I. A'notc'hed rackor bar m supported on the frame of the machine in a plane {below the 'ation, of the machine.

-tion of the tacks in the mass.

path of unovement of the slide F, is engaged by a pawl m pivoted to the oscillating hammer lever I. lVith jeach oscillation of the lever Ithe pawl inzengagement with one ofthe notches of the rack on will drag the slide abackward a distance equal to the spacing of the notches in the bar m with the result that the slide is traversedstep by step along the winding drum and a tack is driven upon each movement.

and permit the in chine to run idle The drum may then be collapsed by turning the lever (Z so as to break the toggle and the barrel --or hoop will be removed therefrom.

A spring; interposed between the frame and thelower side ofthe slide E, serves to support th latter in its normal position above the drum, andprovides the clearance through which the strip of veneer 1s passed to be gripped by the clamping jaws of tee drum.

A novel movement in the operation of my improved invention, and to which I desire to call particular attention is that the tacks are automatically passed from the re ceptacle 9 into the slotted guide formed by the bars and 9 So successful is my machine in its operation in this particular, that the said receptacle will become entirely emptied of tacks. in the continued oper- This result is due to the violent agitation constantly going on among the tacks in the said receptacle. The pawl m5 engaging the toothed rack ou imparts a quick movement to the rear, of the slide F and the parts carried thereby, including the receptacle 9. The tendency of this movement is to cause the tacks in the receptacle to crowd to the front end thereof and fall intothe pocket (7. where they The blowofthe hammer in setting a tack 15 of such force as to impart a great vibration to the mass of tacks in the receptacle, and-tends to produce a separa- These opersting onditions serve to cause the feeding of he tacks intothe slotted guide in .what

is practically a continuous stream, and such tacks as are not vpresented to the wheel with their points properly positioned in the slotted guide will be repelled until presented in proper position to pass under-the wheel and out of the receptacle 9.

ili iodification of the invention may be made without departing from the spirit thereof. 1

As soonasthe stack driving mechanism has traversed the Having thus described my invention, what I claim and desire to secure by Letters Pat-- ent of the United States, is:

1. A tack driving machine comprising a frame, a slide guided therein, a stationary tack receptacle supported upon the slide, a wheel rotating within the receptacle to po sition the tacks, an inclined slotted guide leading from the receptacle through which the tacks pass when positioned by the rotation of the wheel, in combination with a vibrating lever provided with devices to pass the tacks singly from the said guide, means for vibrating the said lever, a dropper to sustain the tacks when released from the slotted guide, nailing devices mounted upon and movable with the slide, and means for actuating the dropper to release the tack for action by the nailing mechanism.

2. A tack driving machine comprising a frame, a slide guided therein, a stationary tack receptacle supported upon the slide, a wheel rotating within the receptacle to position the tacks, an inclined slotted guide leading from the receptacle through which the tacks pass when positioned by the rota-- tion of the wheel, in combination with a vibrating lever provided with devices to pass the tacks singly from the said guide, a movable dropper to sustain the tacks when rely moved during the operation of the machine and carrying the tacking mechanism, comprising a stationary receptacle mounted upon the slide, an inclined slotted guide leading from said hopper and mounted on the slide, a rotatable member disposed over said guide adapted to repel any tasks not properly received in said guide, means to rotate said member, tack feeding means in said guide adapted for releasing one tack ata time, means for actuating said tack feeding means, a dropper carried by said slide adapted to sustain tacks released by said tack feedingmeans and means for actuating said dropper to deliver tacks to the tacking mechanism.

Intestimony whereof I have signed in name at Milwaukee, this 14th day of February,1920. I

H. n. oooLEY. 

